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Kernel: Add a mode flag to sys$purge and allow purging clean inodes

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This commit is contained in:
Andreas Kling 2019-12-29 13:16:53 +01:00
parent c74cde918a
commit 1f31156173
7 changed files with 83 additions and 17 deletions
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40
Kernel/Process.cpp
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@ -404,20 +404,36 @@ int Process::sys$madvise(void* address, size_t size, int advice)
return -EINVAL;
}
int Process::sys$purge()
int Process::sys$purge(int mode)
{
NonnullRefPtrVector<PurgeableVMObject> vmobjects;
{
InterruptDisabler disabler;
MM.for_each_vmobject([&](auto& vmobject) {
if (vmobject.is_purgeable())
vmobjects.append(static_cast<PurgeableVMObject&>(vmobject));
return IterationDecision::Continue;
});
}
int purged_page_count = 0;
for (auto& vmobject : vmobjects) {
purged_page_count += vmobject.purge();
if (mode & PURGE_ALL_VOLATILE) {
NonnullRefPtrVector<PurgeableVMObject> vmobjects;
{
InterruptDisabler disabler;
MM.for_each_vmobject([&](auto& vmobject) {
if (vmobject.is_purgeable())
vmobjects.append(static_cast<PurgeableVMObject&>(vmobject));
return IterationDecision::Continue;
});
}
for (auto& vmobject : vmobjects) {
purged_page_count += vmobject.purge();
}
}
if (mode & PURGE_ALL_CLEAN_INODE) {
NonnullRefPtrVector<InodeVMObject> vmobjects;
{
InterruptDisabler disabler;
MM.for_each_vmobject([&](auto& vmobject) {
if (vmobject.is_inode())
vmobjects.append(static_cast<InodeVMObject&>(vmobject));
return IterationDecision::Continue;
});
}
for (auto& vmobject : vmobjects) {
purged_page_count += vmobject.release_all_clean_pages();
}
}
return purged_page_count;
}